IG Intra-Gastric (healthcare) IG Inspector Gadget (cartoon) IG International Ground (commerical carriage modality; FedEx) IG Islamic Group IG Inspection Générale (French: General Inspectorate) IG Intrinsic Gettering IG Infogrames (European software company) IG Inscriptiones Graecae (definitive collection...
IISInvestigator Initiated Study(healthcare) IISInformation Institute of Syracuse IISInternet Information System IISInstitute of Information Scientists IISInstitutional Investment Services IISIrish Institute of Sport(est. 2006; Ireland) IISInter-IC Sound(aka I2S) ...